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Biomedical subjects

B van Ramshorst

Publications and source records attributed to B van Ramshorst.

At least 19 recordsLinked to original sources
PubMed2006

Laparoscopic gastric banding for morbid obesity: outpatient procedure versus overnight stay.

BACKGROUND: In western countries, laparoscopic gastric banding is increasingly used in the surgical treatment of morbid obesity. This study aimed to investigate the feasibility, safety, morbidity, and costs of an outpatient procedure (OP) compared with an overnight stay (OS). METHODS: In a 2-year period, 50 consecutive patients were randomized to an OP group or an OS group. RESULTS: In the OP group, 76% of the patients were successfully discharged the same day, without readmissions. Four procedures were converted, and one complication occurred. The patients in the OP group seemed to experience more pain (p = 0.009). Satisfaction scores were 8.1 (OP) and 8.8 (OS) (p = 0.06). Half of the OP patients and most of the OS patients preferred a clinical admission. The OP treatment cost 600 euros less than OS. CONCLUSION: With proper patient selection, laparoscopic gastric banding can be performed safely and at lower cost as an outpatient procedure.

Adult↗
PubMed2006

Effect of laparoscopic gastric banding on esophageal motility.

BACKGROUND: Alterations in esophageal motility may occur after placement of an adjustable gastric band as treatment for morbid obesity, near the gastro-esophageal junction. It causes an outlet obstruction, especially during follow-up after the band is filled. METHODS: 29 morbidly obese patients underwent conventional manometry preoperatively, 6 weeks postoperatively before and after filling the band and at 6 months postoperatively. A questionnaire was used to assess upper gastrointestinal symptoms during follow-up. RESULTS: After band placement, there was a significant increase in lower esophageal sphincter (LES) end-expiratory pressure at 6 weeks with an empty band: 1.3 (0.9-1.9) kPa (median (interquartile range) (P=0.003), 6 weeks with a filled band: 2.1 (1.5-2.8) kPa (P=0.0001), and at 6 months: 1.5 (1.3-1.9) kPa (P=0.001), compared to the preoperative pressure: 0.8 (0.6-1.3) kPa. Also after band placement, the high pressure zone length increased (preop 5.0 (4.3-6.0) cm vs 6 weeks 6.0 (5.0-6.5) cm (P=0.003). The propagation of peristaltic contractions was not significantly altered after band placement. Heartburn decreased 6 weeks postoperatively (P=0.04) but increased at 6 months. Heartburn at 6 months was correlated with pouch formation (0.667; P<0.01). CONCLUSION: Adjustable gastric band placement causes an increase in LES pressure and length of the high pressure zone. It decreases reflux symptoms in the short-term, but this effect appears not to be related to an effect on LES pressure or length. Pouch formation increases reflux symptoms without having any relationship to LES pressure and length. Band placement in the short-term does not disturb propagation of esophageal contractions.

Adult↗
PubMed2005

[Timing and choice of intervention in necrotising pancreatitis].

Three patients, men aged 49, 62 and 33 years, were admitted with acute abdominal symptoms due to necrotising pancreatitis. They underwent multiple interventions during a hospital stay of several months, but ultimately recovered completely. In case of infected (peri-)pancreatic necrosis, intervention is required. Good clinical judgement in the differentiation between the septic inflammatory-response syndrome, sepsis and infected necrosis as the cause of the clinical condition is important. Because of the different intervention strategies, treatment by a team comprising a radiologist, gastroenterologist, intensive care specialist and gastrointestinal surgeon is required. Randomised studies on intervention in infected pancreatic necrosis are lacking. In 2002, to improve the treatment of patients with acute (necrotising) pancreatitis via a combination of research, consultation and centralisation, the Dutch Acute Pancreatitis Study Group was formed.

Adult↗
PubMed2000

Quality of life after laparoscopic adjustable gastric banding for severe obesity: postoperative and retrospective preoperative evaluations.

BACKGROUND: The aim of this study was to examine postoperative as well as retrospective preoperative evaluations of multiple dimensions of quality of life of patients with morbid obesity after laparascopic adjustable gastric banding (LAGB). METHODS: 12 to 38 months after LAGB, 74 consecutive patients (64 female, 10 male, mean age 36.6 years, age range 23-56) filled out the RAND-36 Health Survey questionnaire to evaluate their current postoperative as well as their past preoperative quality of life. RESULTS: Pre- to 1 year postoperative weight reduction (127.5 to 100.7 kg) and change of BMI (45.2 to 35.6 kg/m2) were highly significant (p<0.001). As compared to age reference groups, the preoperative quality of life was evaluated very poor (p<0.002), postoperative psychological and social quality of life were about normal (all p's >0.10), and postoperative physical functioning (p=0.04), vitality (p=0.01) and general health (p=0.03) were below normal. No differences were found between postoperative evaluations of patient groups with varying postoperative follow-up duration, but patients in the second year after surgery evaluated some aspects of their preoperative quality of life as poorer than patients in the third year after surgery. CONCLUSION: Postoperative psychosocial quality is at a level that may be expected to motivate patients to consolidate the surgically established weight reduction, but attention should be paid to the physical condition. Since the relative gain in quality of life as experienced by patients tends to be evaluated less with a longer duration of the postoperative interval, the risk of relapse may increase with passage of time.

Adult↗
PubMed1997

[Complication rate in laparoscopic cholecystectomy not different for residents in training and surgeons].

OBJECTIVE: To assess the difference in safety of laparoscopic cholecystectomy performed by residents and staff surgeons. SETTING: St. Antonius Hospital, Nieuwegein, the Netherlands. DESIGN: Retrospective study. METHOD: Results of 649 laparoscopic cholecystectomies performed by staff surgeons experienced in laparoscopic surgery, by residents under supervision of a staff surgeon, by residents without supervision and by inexperienced surgeons, were compared. RESULTS: Patients were comparable, except for liver function disorders and raised sedimentation rates, of which there were more in the group operated by the non-supervised residents, compared with the staff surgeons. Average operation time was 57 minutes in all four groups. Non-supervised residents had more retained stones than staff surgeons (19 vs 6%) and reported more bleeding during surgery than staff surgeons (21 vs 8%). Conversion rate was the same (3.9%) in all four groups. Complications occurred in 5.7%; this also was the same in the four groups. CONCLUSION: Residents following a traditional surgical training without practice on animals, perform laparoscopic cholecystectomy as quickly as and with the same conversion and complication rates as their teachers.

Cholecystectomy, Laparoscopic↗
PubMed1996

The development of valvular incompetence after deep vein thrombosis: a 7 year follow-up study with duplex scanning.

OBJECTIVES: To study the development and progression in time of deep venous valve incompetence with Duplex ultrasonography in combination with distal cuff deflation in patients with a history of deep venous thrombosis (DVT) and to evaluate symptoms of chronic venous insufficiency (CVI). DESIGN: Prospective cohort study. MATERIALS AND METHODS: In a long term follow-up study the deep venous system of 24 patients (7 men, 17 women, mean age 51 years) of an initial group of 27 with phlebographically documented deep venous thrombosis were examined with Duplex scanning at two intervals (mean 34 and 86 months) after DVT. RESULTS: All but one segments recanalised. Deep venous incompetence occurred exclusively in post-DVT segments. At first follow-up 48% of the post-thrombotic segments showed valve incompetence, while at second follow-up this had increased to 60% (p < 0.001). Venous segments of the upper leg mainly contributed to this increase. Our group of 24 patients was too small to find any significant correlation between symptoms, thrombosis and valvular incompetence. CONCLUSIONS: The development of deep vein valve incompetence after deep vein thrombosis is a progressive process over more than 5 years.

Adult↗
PubMed1994

The development of valvular incompetence after deep vein thrombosis: a follow-up study with duplex scanning.

PURPOSE: Duplex ultrasonography with distal cuff deflation was used to establish the physiologic reflux duration in different segments of the deep venous system in healthy individuals, and to document the occurrence of deep vein valve incompetence in patients after deep vein thrombosis (DVT). METHODS: Two hundred fifty-two vein segments in 42 legs of 21 healthy individuals and 160 deep vein segments in 27 patients with phlebographically documented DVT were examined with duplex scanning. RESULTS: The duration of reflux in healthy subjects was significantly shorter in distal deep vein segments. Ninety-five percent of the values were less than 0.88, 0.8, 0.8, 0.28, 0.2, and 0.12 seconds, respectively, for the common femoral, superficial femoral, deep femoral, popliteal, and posterior tibial vein (at midcalf and ankle level). The 95 percentile for reflux duration in the superficial venous system was 0.5 seconds for all vein segments, regardless of the location. No significant correlation was found between the reflux peak flow velocity and reflux duration (R = 0.6). The reflux peak flow velocity is therefore not useful as a parameter of the degree of reflux. The patient group was examined with an interval of 18 to 51 months (mean 34 months) after DVT. Forty-five percent of the initially affected segments showed valve incompetence at follow-up (n = 54); only three of 40 segments initially free from thrombus showed pathologic reflux at follow-up (p < 0.01). Reflux durations in most of the incompetent vein segments were two or more times the normal value of reflux duration. The highest prevalence of valve incompetence was found in the superficial femoral and popliteal vein segment (p < 0.01). None of the patients showed valve incompetence at all levels of the deep venous system. A significant (p = 0.04) relation was found between the extent of the initial thrombosis and the number of refluxing vein segments at follow-up, but no correlation was found between the extent of initial thrombosis and the late clinical symptoms (p = 0.16); clinical symptoms could not be related to the number of incompetent vein segments. CONCLUSIONS: Duplex scanning allows a good discrimination between physiologic and abnormal reflux duration and is an important tool in the evaluation of the postthrombotic limb. Early assessment after DVT may have prognostic value in individual patients.

Adult↗
PubMed1994

Non-invasive detection of deep venous thrombosis: ultrasonography versus duplex scanning.

In a prospective study the diagnostic value of compression ultrasonography (CUS) versus Duplex scanning (DS) in the non-invasive detection of acute femoropopliteal deep venous thrombosis (DVT) was determined. In 114 eligible patients clinically suspected of DVT of the lower extremity, compression ultrasonography and Duplex scanning were performed within 24 hours by different assessors unaware of the outcome of the other test. In 109 patients concordant results of combined compression ultrasonography and Duplex scanning were obtained and considered as a proof of the absence or presence of deep venous thrombosis and no subsequent invasive investigations were performed. In five patients compression ultrasonography and Duplex scanning were discordant and contrast venography was performed. Femoropopliteal thrombosis was present in 47 legs (41%). The sensitivity, specificity and accuracy of compression ultrasonography were 93.6, 97.0 and 95.6%, respectively, and of Duplex scanning 100, 98.5 and 99.1%, respectively. We conclude that compression ultrasonography and Duplex scanning are methods with comparably high accuracy. Because of its availability, accuracy, cost-effectiveness and simplicity we recommend compression ultrasonography as the primary diagnostic test in the detection of deep venous thrombosis.

Adolescent↗
PubMed1992

[Arterial injuries in lower leg fractures, a rare but severe complication].

Vascular injuries of the popliteal or crural arteries complicating tibial fractures are rare. They often lead to acute critical limb ischaemia requiring immediate invasive diagnostic procedures and surgical repair. To illuminate the acute situation of this combined injury two case histories are presented. A comprehensive surgical approach is mandatory to salvage the injured limb.

Adult↗
PubMed1992

Thrombus regression in deep venous thrombosis. Quantification of spontaneous thrombolysis with duplex scanning.

BACKGROUND: Thrombus regression in heparin-treated, acute deep venous thrombosis of the lower extremity is poorly documented in the literature; different rates of thrombus resolution and recanalization are reported. METHODS AND RESULTS: In a prospective follow-up study, duplex scanning was used to evaluate the thrombus regression in patients with documented acute femoropopliteal thrombosis. Eighty vein segments in 20 legs of 18 patients were subjected to repeat duplex scans at 1, 3, 6, 12, and 26 weeks after diagnosis; 49 segments showed thrombus at diagnosis. The popliteal vein showed the highest thrombus load at diagnosis, followed in descending order by the superficial femoral, profunda femoris, and common femoral vein segments (p less than 0.001). Thrombus regression was significant (p less than 0.001) in all segments and proceeded at an exponential rate that was equal in the different vein segments of the upper leg. Both thrombus resolution and recanalization appeared to be a function of the initial thrombus load and could not be related to individual vein segments. Recanalization was seen in 23 of 31 initially occluded segments and occurred within the first 6 weeks after diagnosis in 20 of 23 segments. Extension of thrombus despite anticoagulant therapy was observed in 15 vein segments and was not related to the initial thrombosis score (p = 0.1) or individual vein segments (p = 0.23). Thrombus extension in seven patients with prethrombotic conditions was not different (p = 0.9) from the other patients. CONCLUSIONS: Duplex scanning is an important noninvasive tool to quantify thrombus regression in acute deep venous thrombosis in detail without unnecessary discomfort to the patient.

Female↗
PubMed1992

Photoplethysmography reexamined: lack of correlation with duplex scanning.

In a prospective study a comparison was made between the results of photoplethysmography and ultrasonic duplex scanning in 151 consecutive legs with swelling, aching, and suspected venous insufficiency. Thirty-four percent of the legs had a history of previous deep venous thrombosis, 26% had undergone previous superficial vein surgery, and 11% had active or healed ulceration. Photoplethysmographic findings were normal in 86 (57%) of these legs and indicated deep venous disease in 33 (22%). With duplex scanning, incompetent vein segments were found in 140 legs (93%). The kappa coefficient of agreement between the result, classified as either normal, superficial disease only, or deep incompetence, was 0.12 +/- 0.06. In legs with superficial disease, the number of incompetent levels was no greater in legs with abnormal results of photoplethysmography than in legs with normal results of photoplethysmography. In general, an abnormal photoplethysmographic result is related to multilevel reflux and the presence of visible skin changes. Photoplethysmography had the same value, in these patients, to predict the presence of multilevel reflux as had inspection of the skin of the goiter area. These results do not warrant the continued use of photoplethysmography for surgical decision making in patients with suspected venous insufficiency.

Adult↗
PubMed1991

Duplex scanning in the diagnosis of acute deep vein thrombosis of the lower extremity.

In a prospective study the value of duplex scanning in the diagnosis of acute femoro-popliteal thrombosis was compared to conventional contrast venography (CV) as a gold standard. A total of 126 legs in 117 patients suspected of having deep vein thrombosis (DVT) or pulmonary embolism (PE) were examined with both methods. CV and duplex scanning were diagnostic in 98.5 and 97%, respectively. Femoro-popliteal thrombosis was present in 64 legs (prevalence 54%). The sensitivity and specificity of duplex scanning were 90.6% and 94.6%, respectively. A marked improvement in sensitivity from 83.3 to 97% and overall accuracy from 88.7 to 96% was noticed between the first and second half of the study period. Of the individual duplex criteria in the diagnosis of DVT, abnormal vessel wall compressibility was the most accurate. The Doppler measurements however allow evaluation of venous areas difficult to assess with B-mode and add discrimination between partial or total vein occlusion. Duplex scanning is more accurate compared to CV in grading the anatomical extent of thrombosis. Agreement between venography and duplex scanning was found in 75% of the vein segments, in about 20% CV suggested more thrombus formation compared to duplex scanning. Thrombus in the deep femoral vein was documented by duplex scanning in 24 patients including two cases of isolated deep femoral vein thrombosis. Venography failed to visualise the deep femoral vein with sufficient diagnostic accuracy in 88% of the patients vs. 8.5% with duplex scanning. Duplex scanning is an accurate non-invasive test in the diagnosis of acute femoro-popliteal thrombosis and superior to CV in the detection of non-occlusive and deep femoral vein thrombosis.

Acute Disease↗
PubMed1988

The dynamic condylar screw in subtrochanteric fractures of the femur.

Early experience with the AO dynamic condylar screw in subtrochanteric fractures of the femur showed a solid and stable osteosynthesis in 19 patients. The ease of insertion of the dynamic condylar screw, the firm proximal fixation, the increased strength and resistance to stress failure should, in our opinion, make this technique a favoured form of treatment for this particular type of fracture.

Adult↗